Recent rainfall has caused significant water damage at the Chargers'practice facility on Murphy Canyon Road, resulting in a flooded practice field and ruined floors in the locker and weight-training rooms.

Per its agreement with the Chargers, the city of San Diego is on the hook for the repairs, said Qualcomm Stadium Manager Mike McSweeney, who is helping manage the repairs. McSweeney said the city's insurance would cover it and didn't have an estimate on damage costs.

“But the number is going up,” he said.

He estimated that 75 percent of the carpet in the affected rooms had to be torn up. Some of the turf may have to be removed, too.

Drainage pipes had overflowed into the affected areas after rainfall.

The Chargers' $11.6 million practice facility opened in 1997 and was part of the Qualcomm Stadium expansion agreement negotiated between the city and Chargers before that. Similarly, the city fixes the plumbing and air conditioning there when it breaks, McSweeney said.

A few weeks earlier, the Chargers escaped a flood at Qualcomm Stadium. On Jan. 17, a major pipe burst near Gate E, rupturing the pavement and spilling hundreds of gallons of water a minute.

The AFC Championship Game was played that day, and had the Chargers been hosting it, the television coverage could have been affected because the rupture was in the area where TV trucks set up.

The city shut off the water at the stadium earlier that day for repair work at a nearby property, McSweeney said. When it was turned back on, he said, the city may have overcharged it, causing the rupture.

McSweeney said the Monster Jam truck event held that day at the stadium was not affected.